<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Test: clear and clearance calculation - margin collapsing</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
  <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#flow-control" />
  <meta content="" name="flags" />
  <meta content="With clear: left, the top border edge of the last paragraph must be below the floating paragraph, i.e., 50px lower. That means that the margin-bottom of the first paragraph must not collapse with the margin-top of the last paragraph and clearance must be added such that clearance + margin-top of last paragraph = 50px, i.e., clearance = 50px - margin-top  of last paragraph = 50px - 75px = - 25px." name="assert" />
  
  <style type="text/css">* { margin: 0; padding: 0 }<![CDATA[
  body
  {
  margin: 8px;
  }

  #overlapped-red
  {
  background-color: red;
  height: 100px;
  left: 8px;
  position: absolute;
  right: 8px;
  top: 108px;
  z-index: -1;
  }

  #firstParg
  {
  height: 25px;
  margin-bottom: 25px; 
  margin-top: 0px;
  }

  #floatingParg
  {
  float: left;
  height: 50px;
  margin: 0;
  }

  #lastParg
  {
  background-color: lime;
  clear: left;
  height: 100px;
  margin-top: 75px;
  }
  ]]></style>

 </head>

 <body>

  <div id="overlapped-red"></div>

  <p id="firstParg"></p>

  <p id="floatingParg"></p>

  <p id="lastParg"></p>

  <p>Test passes if there is a wide bright green rectangle above and <strong>no red</strong>.</p>

 </body>
</html>